Chapter 4.4, Problem 1QQ

Interpretation Introduction

Interpretation:

IUPAC name for the given aldehyde has to be chosen from the given options.

Concept Introduction:

For naming an aldehyde in IUPAC nomenclature, the suffix “-al” is added to the parent alkane name.

IUPAC rules for naming an aldehyde:

• The longest parent carbon chain is identified that includes the carbonyl group.

• The parent chain name is changed by replacing the suffix “-e” with “-al”.

• Numbering is done in a way that the carbonyl group is designated as number 1.  This is not indicated in the part of the name because for aldehyde, the carbonyl carbon is always numbered 1.

• The identity and location of substituents if any has to be determined and this information has to be added in front of the IUPAC name.

• If the carbonyl functional group is attached to a ring of carbon atoms, the ring is named and “-carbaldehyde” is added as suffix.